Troubleshooting - ITT Conoflow HP400 Instruction And Maintenance Manual

TROUBLESHOOTING

When performing necessary corrective action in the following operations, refer to the MAINTENANCE section for the necessary
procedure.
PROBLEM:
The regulated pressure continues to increase after lock-up and without change in the control mechanism position.
POSSIBLE CAUSE:
The main valve seat needs replacement; follow maintenance procedure and regulator assembly.
PROBLEM:
Continuous leakage through the bonnet with the outlet pressure on the regulator.
POSSIBLE CAUSE:
Sensor O-ring is worn, leaking, and needs to be replaced.
PROBLEM:
Regulated pressure drops off sharply when the flow is within the regulator's capabilities.
POSSIBLE CAUSE:
Clogged inlet screen. Remove the old filter with a sharp instrument and press in a new filter using the blunt end of an instrument.
PROBLEM:
Outlet Pressure will not adjust high enough.
POSSIBLE CAUSE:
Supply pressure is too low and needs to be increased.
Maximum pressure limit (handwheel) is improperly adjusted and needs to be re-adjusted, follow maintenance procedure "setting the
maximum output limit."
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THIS INFORMATION IS SUBJECT TO THE CONTROLS OF THE EXPORT ADMINISTRATION REGULATIONS (EAR). THIS INFORMATION SHALL NOT BE PROVIDED TO
NON-US PERSONS OR TRANSFERRED BY ANY MEANS TO ANY LOCATION OUTSIDE THE UNITED STATES CONTRARY TO THE REQUIREMENTS OF THE EAR.
An ITT Company
HP400-IOM Rev. 0 7/20